CyberSecBulletin
CVE-2024-25560NVD status: Analyzed

BIG-IP: NULL Pointer Dereference

Published Updated By the CyberSecBulletin desk

CVE-2024-25560 is a high-severity NULL pointer dereference vulnerability in BIG-IP from F5, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 17.1.1, 16.1.4 as the first without the flaw, so updating BIG-IP to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update BIG-IP to 17.1.1 or 16.1.4, whichever matches your release line, or a later version.
  2. Update BIG-IP Next CNF to 1.2.0 or a later version.
  3. Update big-ip_next_cloud-native_network_functions to 1.2.0 or a later version.
  4. Read the advisory on my.f5.com for workarounds and exact fixed builds.
  5. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
F5BIG-IP17.1.0 up to, but not including, 17.1.1; 16.1.0 up to, but not including, 16.1.4; 15.1.0 and later17.1.1, 16.1.4
F5BIG-IP Next CNF1.1.0 up to, but not including, 1.2.01.2.0
F5big-ip_next_cloud-native_network_functions1.1.0 up to, but not including, 1.2.01.2.0
F5Big-ip Access Policy Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Advanced Firewall Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Advanced Web Application Firewall15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Analytics15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Application Acceleration Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Application Security Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Application Visibility And Reporting15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Automation Toolchain15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Carrier-grade Nat15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Container Ingress Services15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Ddos Hybrid Defender15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Domain Name System15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Edge Gateway15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Fraud Protection Service15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Global Traffic Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Link Controller15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Local Traffic Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Policy Enforcement Manager15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip SSL Orchestrator15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Webaccelerator15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4
F5Big-ip Websafe15.1.0 up to, but not including, 15.1.10.8; 16.1.0 up to, but not including, 16.1.4; 17.1.015.1.10.8, 16.1.4

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CNA (f5.com).

Official description

When BIG-IP AFM is licensed and provisioned, undisclosed DNS traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

How developers prevent this class of flaw

  • For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
  • Select a programming language that is not susceptible to these issues.
  • Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

More NULL Pointer Dereference vulnerabilities (CWE-476)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in BIG-IP

All BIG-IP vulnerabilities

Recent NULL Pointer Dereference vulnerabilities

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